From: Thomas Monjalon <thomas@monjalon.net>
To: Matan Azrad <matan@nvidia.com>
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"Xueming(Steven) Li" <xuemingl@nvidia.com>
Subject: Re: [dpdk-dev] [PATCH] vdpa/mlx5: fix polling threads scheduling
Date: Wed, 10 Feb 2021 22:17:53 +0100 [thread overview]
Message-ID: <2087811.Wx4xBajQNY@thomas> (raw)
In-Reply-To: <BY5PR12MB4324D427ABA75D24CCB66631A18E9@BY5PR12MB4324.namprd12.prod.outlook.com>
> >> When the event mode is with 0 fixed delay, the polling-thread will
> >> never give-up CPU.
> >>
> >> So, when multi-polling-threads are active, the context-switch between
> >> them will be managed by the system which may affect latency according
> >> to the time-out decided by the system.
> >>
> >> In order to fix multi-devices polling thread scheduling, this patch
> >> forces rescheduling for each CQ poll iteration.
> >>
> >> Move the polling thread to SCHED_RR mode with maximum priority to
> >> complete the fairness.
> >>
> >> Fixes: 6956a48cabbb ("vdpa/mlx5: set polling mode default delay to
> >> zero")
> >>
> >> Signed-off-by: Matan Azrad <matan@nvidia.com>
> >
> > Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>
> Acked-by: Xueming Li <xuemingl@mellanox.com>
converted to nvidia.com
Applied, thanks
prev parent reply other threads:[~2021-02-10 21:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-08 9:28 Matan Azrad
2021-02-08 11:17 ` Maxime Coquelin
2021-02-09 3:15 ` Xueming(Steven) Li
2021-02-10 21:17 ` Thomas Monjalon [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2087811.Wx4xBajQNY@thomas \
--to=thomas@monjalon.net \
--cc=dev@dpdk.org \
--cc=matan@nvidia.com \
--cc=maxime.coquelin@redhat.com \
--cc=xuemingl@nvidia.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).